//第一种方法
function method1(tableid) {

    var curTbl = document.getElementById(tableid);
    var oXL = new ActiveXObject("Excel.Application");
    var oWB = oXL.Workbooks.Add();
    var oSheet = oWB.ActiveSheet;
    var sel = document.body.createTextRange();
    sel.moveToElementText(curTbl);
    sel.select();
    sel.execCommand("Copy");
    oSheet.Paste();
    oXL.Visible = true;

}

//第二种方法
function method2(tableid) {

    var curTbl = document.getElementById(tableid);
    var oXL = new ActiveXObject("Excel.Application");
    var oWB = oXL.Workbooks.Add();
    var oSheet = oWB.ActiveSheet;
    var Lenr = curTbl.rows.length;
    for (i = 0; i < Lenr; i++) {
        var Lenc = curTbl.rows(i).cells.length;
        for (j = 0; j < Lenc; j++) {
            oSheet.Cells(i + 1, j + 1).value = curTbl.rows(i).cells(j).innerText;

        }

    }
    oXL.Visible = true;
}

//第三种方法
function getXlsFromTbl(inTblId, inWindow) {

    try {
        var allStr = "";
        var curStr = "";
        if (inTblId != null && inTblId != "" && inTblId != "null") {

            curStr = getTblData(inTblId, inWindow);

        }
        if (curStr != null) {
            allStr += curStr;
        }

        else {

            alert("你要导出的表不存在");
            return;
        }
        var fileName = getExcelFileName();
        doFileExport(fileName, allStr);

    }

    catch (e) {

        alert("导出发生异常:" + e.name + "->" + e.description + "!");

    }

}

function getTblData(inTbl, inWindow) {

    var rows = 0;
    var tblDocument = document;
    if (!!inWindow && inWindow != "") {

        if (!document.all(inWindow)) {
            return null;
        }

        else {
            tblDocument = eval(inWindow).document;
        }

    }

    var curTbl = tblDocument.getElementById(inTbl);
    var outStr = "";
    if (curTbl != null) {
        for (var j = 0; j < curTbl.rows.length; j++) {
            for (var i = 0; i < curTbl.rows[j].cells.length; i++) {

                if (i == 0 && rows > 0) {
                    outStr += " t";
                    rows -= 1;
                }

                outStr += curTbl.rows[j].cells[i].innerText + "t";
                if (curTbl.rows[j].cells[i].colSpan > 1) {
                    for (var k = 0; k < curTbl.rows[j].cells[i].colSpan - 1; k++) {
                        outStr += " t";
                    }
                }
                if (i == 0) {
                    if (rows == 0 && curTbl.rows[j].cells[i].rowSpan > 1) {
                        rows = curTbl.rows[j].cells[i].rowSpan - 1;
                    }
                }
            }
            outStr += "rn";
        }
    }

    else {
        outStr = null;
        alert(inTbl + "不存在 !");
    }
    return outStr;
}

function getExcelFileName() {
    var d = new Date();
    var curYear = d.getYear();
    var curMonth = "" + (d.getMonth() + 1);
    var curDate = "" + d.getDate();
    var curHour = "" + d.getHours();
    var curMinute = "" + d.getMinutes();
    var curSecond = "" + d.getSeconds();
    if (curMonth.length == 1) {
        curMonth = "0" + curMonth;
    }

    if (curDate.length == 1) {
        curDate = "0" + curDate;
    }

    if (curHour.length == 1) {
        curHour = "0" + curHour;
    }

    if (curMinute.length == 1) {
        curMinute = "0" + curMinute;
    }

    if (curSecond.length == 1) {
        curSecond = "0" + curSecond;
    }
    var fileName = "table" + "_" + curYear + curMonth + curDate + "_"
        + curHour + curMinute + curSecond + ".csv";
    return fileName;

}

function doFileExport(inName, inStr) {
    var xlsWin = null;
    if (!!document.all("glbHideFrm")) {
        xlsWin = glbHideFrm;
    }
    else {
        var width = 6;
        var height = 4;
        var openPara = "left=" + (window.screen.width / 2 - width / 2)
            + ",top=" + (window.screen.height / 2 - height / 2)
            + ",scrollbars=no,width=" + width + ",height=" + height;
        xlsWin = window.open("", "_blank", openPara);
    }
    xlsWin.document.write(inStr);
    xlsWin.document.close();
    xlsWin.document.execCommand('Saveas', true, inName);
    xlsWin.close();

}

//第四种
function method4(tableid) {

    var curTbl = document.getElementById(tableid);
    var oXL;
    try {
        oXL = new ActiveXObject("Excel.Application"); //创建AX对象excel
    } catch (e) {
        alert("无法启动Excel!\n\n如果您确信您的电脑中已经安装了Excel，" + "那么请调整IE的安全级别。\n\n具体操作：\n\n" + "工具 → Internet选项 → 安全 → 自定义级别 → 对没有标记为安全的ActiveX进行初始化和脚本运行 → 启用");
        return false;
    }
    var oWB = oXL.Workbooks.Add(); //获取workbook对象
    var oSheet = oWB.ActiveSheet;//激活当前sheet
    var sel = document.body.createTextRange();
    sel.moveToElementText(curTbl); //把表格中的内容移到TextRange中
    sel.select(); //全选TextRange中内容
    sel.execCommand("Copy");//复制TextRange中内容
    oSheet.Paste();//粘贴到活动的EXCEL中
    oXL.Visible = true; //设置excel可见属性
    var fname = oXL.Application.GetSaveAsFilename("将table导出到excel.xls", "Excel Spreadsheets (*.xls), *.xls");
    oWB.SaveAs(fname);
    oWB.Close();
    oXL.Quit();
}


//第五种方法
var idTmr;

function getExplorer() {
    var explorer = window.navigator.userAgent;
    //ie
    if (explorer.indexOf("MSIE") >= 0) {
        return 'ie';
    }
    //firefox
    else if (explorer.indexOf("Firefox") >= 0) {
        return 'Firefox';
    }
    //Chrome
    else if (explorer.indexOf("Chrome") >= 0) {
        return 'Chrome';
    }
    //Opera
    else if (explorer.indexOf("Opera") >= 0) {
        return 'Opera';
    }
    //Safari
    else if (explorer.indexOf("Safari") >= 0) {
        return 'Safari';
    }
}

/**
 * @Author Sunliangliang 2018/11/16 19:42
 * @Description 根据tableId导出表格到excel
 * @params tableid 导出到excel表格对应table的id
 * @params name 导出的excel表格的名称
 */
function method5(tableid,name) {
    if (getExplorer() == 'ie') {
        var curTbl = document.getElementById(tableid);
        var oXL = new ActiveXObject("Excel.Application");
        var oWB = oXL.Workbooks.Add();
        var xlsheet = oWB.Worksheets(1);
        var sel = document.body.createTextRange();
        sel.moveToElementText(curTbl);
        sel.select();
        sel.execCommand("Copy");
        xlsheet.Paste();
        oXL.Visible = true;

        try {
            var fname = oXL.Application.GetSaveAsFilename("Excel.xls", "Excel Spreadsheets (*.xls), *.xls");
        } catch (e) {
            print("Nested catch caught " + e);
        } finally {
            oWB.SaveAs(fname);
            oWB.Close(savechanges = false);
            oXL.Quit();
            oXL = null;
            idTmr = window.setInterval("Cleanup();", 1);
        }

    }
    else {
        tableToExcel(tableid,name)
    }
}

function Cleanup() {
    window.clearInterval(idTmr);
    CollectGarbage();
}

var tableToExcel = (function () {
    var uri = 'data:application/vnd.ms-excel;base64,',
        template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel"' +
            'xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet>'
            + '<x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets>'
            + '</x:ExcelWorkbook></xml><![endif]-->' +
            ' <style type="text/css">' +
            'table th {' +
            'background-color:#eee;' +
            'width: 100px;' +
            'height: 30px;' +
            'text-align: center;' +
            'padding:5px 7px;' +
            ' }' +
            'table td {' +
            'padding:3px 5px;' +
            'width: 100px;' +
            'height: 30px;' +
            'text-align: center;' +
            'border:1px solid #eee;' +
            'font-size:12px;' +
            ' }' +
            '</style>' +
            '</head><body ><table class="excelTable">{table}</table></body></html>',
        base64 = function (s) {
            return window.btoa(unescape(encodeURIComponent(s)))
        },
        format = function (s, c) {
            return s.replace(/{(\w+)}/g,
                function (m, p) {
                    return c[p];
                })
        }
    return function (table, name) {
        if (!table.nodeType){
            table = document.getElementById(table)
        }
        var ctx = {worksheet: name || 'Worksheet', table: table.innerHTML}
        // window.location.href = uri + base64(format(template, ctx));
        // console.log(base64(format(template, ctx)));
        document.getElementById("dlink").href = uri + base64(format(template, ctx));
        document.getElementById("dlink").download = name;//这里是关键所在,当点击之后,设置a标签的属性,这样就可以更改标签的标题了
        document.getElementById("dlink").click();
    }
})();